Quote:
Originally Posted by hedgie
Just to be clear;
-the hum is only from the cable box, no other sources?
-the hum will follow the cable box if it is swapped from one channel to another on the AV Amp.
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Yes: If only the AV receiver, the speakers (unpowered) and the subwoofer are connected to each other and connected to the socket, the hum is audible.
No and Yes: The hum is heard already heard with the AV receiver in standby. It does not matter how the receiver is switched, it does not matter which cable is connected to where: Any cable, be it video from the Scart or one of the two analog Audio RCA connectors to any input port port on the AV receiver (video or audio) will cause the Subwoofer to start humming (unless the subwoofer has switched into standby itself).
Connecting the TV to the above changes the tone of the Hum somewhat, but without the TV, Av Receiver and Subwoofer alone produce
no hum.
So this pretty much pinpoints to the STB.
---------- Post added at 20:40 ---------- Previous post was at 20:38 ----------
In reply to Misterguitar: This is very interesting. Thanks!
---------- Post added at 20:48 ---------- Previous post was at 20:40 ----------
However, how do I explain this to the VM Tech support?
I sort of expect them to say something like
"Your STB box works with a plain Tele. Connecting it to a surround receiver is your problem!" Furthermore convincing them that something is their fault is usually very difficult, especially since I probably cannot show them my "fix", because I don't think VM appreciates me tinkering with their STB, faulty or not. Sure, it is just a grounding wire, but most people do have a healthy respect for electricity and would cringe seeing an extra cable leaving the lead (albeit I did it neatly, taking a proper three-wire plug and a spare C7 plug, separating the gound wire just 5cm before the case, including a pull-relief and fastening it around one of the STB's screws that hold the C8 socket). I doubt that communication with them will be easy...
Maybe I just stick with it and don't change my running system...?